Amalgamating-machine.



No. 770,290. PATENTED SEPT. zo, 1904.

' P. J. HOYT.

AMALGAMATING MACHINE.

APPLIGATION FILED APR. 22, 1903. N0 MODEL. 2 SHEETS-SHEET 1.

PATENTED SEPT. 20, 1904.

P. J. HOYT. AMALGAMA'I'ING` MACHINE..

APPLICATION FILED APR. 22, 1903.

2 sHBETssHEBT 2.

N0 MODEL.

Mew/Ef Patented September 20, 1904:.v

PATENT @reina FREDERICK J. HOYI, OF CHICAGO, ILLINOIS.

AIVIALGAIVIATING-IVIAGHINE.

SPECIFICATION forming part of Letters Patent No. 770,290, dated September 20, 1904.

Application filed April 22, 1903.

T0 all whom, t may concern,.-

Be it known that I, FREDERICK J. HOYT, a citizen ofthe United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Amalgamating-h/Iachines, which are fully set forth in the following specification, reference being had to the accompanying drawings, forming a part hereof, and in which Figure l shows my said new amalgamatingmachine in central vertical section. Fig. 2 shows a modified form of its construction. Fig. 3 shows a spherical member thereof, separated and in section on a plane turned a quarter-way round from that shown in the two preceding figures.

f Like reference-letters denote like parts throughout.

The object of my invention is to produce a more efHcient machine for dry amalgamation than is now obtainable. To attain said desired end, I construct my said new machine in substantially the following manner, namely: I provide a tank or holder A, having an interiorly-concaved bottom, in the axial center of which is a pipe m, afoot or more in length, extending equally inward and outward, screwthreaded interiorly at said inner end, and exteriorly threaded and provided with a cap /t at its outer end, and into said inner end is screwed the tubular stem l of ahemispherical bowl z', and into said bowl is floated a castof said axle ends and bearings is merely to hold said floated ball axially in line with the axis of the tubes lm and to revolve it with the least possible friction, said globe is either Serial No. 153,801. (No model.)

made of such specific gravity to quicksilver as will coincident the axes of said polar stubs and their bearings. When too light, the globe may be ballasted with quicksilver to the desired specific gravity. The diameter of said globe may be two feet, the thickness of the mercury film /t one inch each, more or less, and the height of the holder A four or five feet.

Into the top of the holder A is set a conical funnel C, supported by a fiange on a flange of said holder and bolted thereto. Said funnel has a crooked discharging-spout g, which throws its charge on one side of the vertical axis of the globe, which by its impact and the weight thereof causes the ball to revolve, or, more accurately, roll in its supporting medium, whereby said load will be discharged onto said medium, which arrests and washes away the sand and debris adherent to the ball after it has become slightly submerged, is released, and rises and moves outward to the brim of the bowl, from which it is lifted and precipitated and passes through the openings a of the holder; but the gold is retained, sinks, and is removed with the cap lc. A fan E sends a current of air through a pipe B, whereof its nozzle f is placed near the entrance of the funnel-spout g, which thereby forces the dry sand, powdered rock, and the like supplied to the funnel through the nozzle g, which through such impact and the weight of such material revolves the globe.

In the modified form of this amalgamator the funnel C is omitted and a hopper O, at the fan or at any convenient place along the pipe B, receives and sends the material through said pipe to the globe D. The advantage gained by said modification is a thorough disintegration of the material before it reaches the amalgamating-ball D, and thereby does its work more eectually.

In Fig. 3 the end of the spout g is shown on its longitudinal side. Its discharging end is concentric with the ball.

What I claim isl. The combination with van air-tube having an air-mover at one end' and a nozzle at its other end, and a funnel under said nozzle of a in mercury, and a casing around said globe bowl and a globe in said bowl Sernisubmergecl Supporting said funnel. in mercury.

2. The combination with an air-tube having 5 an air-mover at one end and a nozzle at; its Witnesses:

other end and a funnel under said nozzle of a WM. ZIMMERMAN, bowl and a globe in said bowl semisubrnerged JOHN MCDONALD.

FREDERICK J. HOYT. 

